快捷指令

快捷指令有多种添加方式。

1. 通过NSUserActivity，静默注册，在用户添加快捷指令时，会有对应的app列表指示，但不会添加到用户的快捷指令列表。
   NSUserActivity 主要用途

Handoff
SiriKit
Spolight search results

2. 通过系统自带的IntentUI，用户主动触发，可以支持用户自定义触发指令。
   1. NSUserActivity

2. IntentUI

1. 先生成 intent文件。参考 掘金文章
2. 添加 INUIAddVoiceShortcutButton

3. present INUIAddVoiceShortcutViewController 控制器

//
//  ViewController.swift
//  SiriKitIntentsUIExample
//
//  Created by Domo on 19/11/2019.
//  Copyright © 2019 Domo. All rights reserved.
//

import UIKit
import IntentsUI

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        addSiriButton(to: self.view)
        
    }


    func addSiriButton(to view: UIView) {
    if #available(iOS 12.0, *) {
        let button = INUIAddVoiceShortcutButton(style: .whiteOutline)
            button.shortcut = INShortcut(intent: intent )
            button.delegate = self
            button.translatesAutoresizingMaskIntoConstraints = false
            view.addSubview(button)
            view.centerXAnchor.constraint(equalTo: button.centerXAnchor).isActive = true
            view.centerYAnchor.constraint(equalTo: button.centerYAnchor).isActive = true
        }
    
    }
    
    func showMessage() {
        let alert = UIAlertController(title: "Done!", message: "This is your first shortcut action!", preferredStyle: UIAlertController.Style.alert)
        alert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
        self.present(alert, animated: true, completion: nil)
    }

}

extension ViewController {
    @available(iOS 12.0, *)
    public var intent: DoSomethingIntent {
        let testIntent = DoSomethingIntent()
        testIntent.suggestedInvocationPhrase = "Test command"
        return testIntent
    }
}

extension ViewController: INUIAddVoiceShortcutButtonDelegate {
    @available(iOS 12.0, *)
    func present(_ addVoiceShortcutViewController: INUIAddVoiceShortcutViewController, for addVoiceShortcutButton: INUIAddVoiceShortcutButton) {
        addVoiceShortcutViewController.delegate = self
        addVoiceShortcutViewController.modalPresentationStyle = .formSheet
        present(addVoiceShortcutViewController, animated: true, completion: nil)
    }
    
    @available(iOS 12.0, *)
    func present(_ editVoiceShortcutViewController: INUIEditVoiceShortcutViewController, for addVoiceShortcutButton: INUIAddVoiceShortcutButton) {
        editVoiceShortcutViewController.delegate = self
        editVoiceShortcutViewController.modalPresentationStyle = .formSheet
        present(editVoiceShortcutViewController, animated: true, completion: nil)
    }
    
    
}

extension ViewController: INUIAddVoiceShortcutViewControllerDelegate {
    @available(iOS 12.0, *)
    func addVoiceShortcutViewController(_ controller: INUIAddVoiceShortcutViewController, didFinishWith voiceShortcut: INVoiceShortcut?, error: Error?) {
        controller.dismiss(animated: true, completion: nil)
    }
    
    @available(iOS 12.0, *)
    func addVoiceShortcutViewControllerDidCancel(_ controller: INUIAddVoiceShortcutViewController) {
        controller.dismiss(animated: true, completion: nil)
    }
    
    
}

extension ViewController: INUIEditVoiceShortcutViewControllerDelegate {
    @available(iOS 12.0, *)
    func editVoiceShortcutViewController(_ controller: INUIEditVoiceShortcutViewController, didUpdate voiceShortcut: INVoiceShortcut?, error: Error?) {
        controller.dismiss(animated: true, completion: nil)
    }
    
    @available(iOS 12.0, *)
    func editVoiceShortcutViewController(_ controller: INUIEditVoiceShortcutViewController, didDeleteVoiceShortcutWithIdentifier deletedVoiceShortcutIdentifier: UUID) {
        controller.dismiss(animated: true, completion: nil)
    }
    
    @available(iOS 12.0, *)
    func editVoiceShortcutViewControllerDidCancel(_ controller: INUIEditVoiceShortcutViewController) {
        controller.dismiss(animated: true, completion: nil)
    }
}

在程序入口获取数据输入

    func scene(_ scene: UIScene, continue userActivity: NSUserActivity) {
        if let _ = userActivity.interaction?.intent as? DoSomethingIntent {

            if let windowScene = scene as? UIWindowScene {
                self.window = UIWindow(windowScene: windowScene)
                let storyboard = UIStoryboard(name: "Main", bundle: nil)
                let initialViewController = storyboard.instantiateViewController(withIdentifier: "ViewController") as! ViewController
                self.window!.rootViewController = initialViewController
                self.window!.makeKeyAndVisible()
                initialViewController.showMessage()
            }
        }
    }

苹果官方文档
NSUserActivity 简书文章
掘金文章，有详细的操作步骤